Sewing-machine for special work.



A. ROSENTHAL.

SEWXNG MACHlNE FOR SPECIAL WORK.

APPUCATIQN FILED DEC. X2. 3912 P111 entvd Oct.

3 SHLETSWSHEET 2.

(inventor,

UNITED STATES PATENT OFFICE.

ARTHUR ROSENTHAL, 0F GRAND RAPIDS, MICHIGAN, ASSIGNOR TO LABEL MACHINE 00., OF GRAND RAPIDS, MICHIGAN.

SEWING-MACHINE FOR SPECIAL WORK.

Application filed December 12, 1912.

pose, or for stitching in similar form for reinforcement or ornamentation.

The invention may he incorporated into a sewing machine when it is first constructed, or it may be provided as an attachment.

The objects of this invention are, First, to provide certain improvements for use in connection with the improved guiding means devised and invented by Michael Petrocchi, appearing in his patent application filed December 12, 1912, Serial No. 736,257. Second, to provide such a. special work structure which is effectively in used and guarded. Third, to provide an improved arrangement and connection of ratchet means for actuating the same. Fourth, to provide in a machine of this kind improved means of elevating the presser foot or work holder which in no way interferes with the feed of the machine when it is at work. Fifth, to provide in such a structure, an improved automatic stop means that will insure the stopping of the machine when the work is completed with the needle also in the elevated position. Sixth, to provide automatic means of insuring complete actuation of the stitching operation. Seventh, to provide improved means of automatically associating the starting and stopping devices whereby perfect work is insured. Eighth, to provide means of insuring the complete release of all actuating and tension means when the machine is stopped. Ninth, to provide improved interlocking means to avoid accidental release of, or mani ulation of par s while the machine is at ii'ork.

Further objects, and objects relating to mere details of construction and operation will definitely appear from the detailed de scription to follow.

Specification of Letters Patent.

Paton ted Oct. 3, 1911 Serial No. 736,258.

I accomplish the objects of my invention by the devices and means described in the following s 'iccifir-ation.

The invention is clearly pointed out in tinclaims.

A structure constituting a preferred cmhodim nt of my invention i'ully iliiif-ti2it(*nl in the accompai mg drummer, fencing a part oi this spci motion. in whiah:

Figure I is a side p r-apcctiw view oi a sewing machine. embmlying the features f my in ention. F; U is also a side pew spective view of s ch irm-turc iron; the. opposite side of the sewing ma. iiinc. hig. III is an in erted plan view o :i sewing machine showing the driving gear {henor and the improved ratchet drhing means for the feed. Fig. l\' is a sectional plan view of the machine, taken on a line correspond dciiuml and ing to line 4- 4 of i' igz. l, the v ii the guide mean-e Wing imncvrd. i {iii an enlarged detail longitudinal ctioria clciation view through the in Ye. means. taken on a linewirre icing! t her 5-5 of Figs. ill and 1 ig. His a dctail pGlSIM-I'iiY, view (ii iii'\ internal inter mediate guide block f the guide me in. Fig. Vii is a detail view of the re .c ic

vers. showing the relation of th some to the trip finger of the automatic stop oi? the sewn ing machine. Fig. vill is" a detail vation view. in full size, oi the m Era; and trip finger and :v' jm-cnt parts. s nthe relations oi the :iillile, a pmtion in sectioned to show drtaiis of the zap.- .u: pressed pins that force the release lovers normally out. Fig. TX an inverted detail perspective iew of the c nt stop lever ac tuated by the carrier head. Fig. X. is a dctail perspective view of the closure slide v for closing the case f the guide mechanism, as they appear in perspective when. l'ClilOVQ l from the slideways. Fig. X1 is an enlarged detail sectional view through the adjustable elevating hook, taken on a line correspond iug to the line l'lll of Fig. II, for raising the work holder or presser foot. is a full size detail view of the parts constituting the ratchet means, showing the relation of the same, with the retaining disk removed. Fig. XIII is a detail perspecti e view of the detent pawl. V inverted perspective view of the actuating xii Fig. is an pawl. Fig. XV is a detail view of the retaining disk 1:, Fig. XVI is an enlarged detail sectional view on line 16-l6of Fig. IV, showing the automatic interlocking means.

In the drawing, all of the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar numerals of reference refer to similar parts throughout the several views.

Considering the numbered parts of the drawing, the base 1, arm 2 and head 3 of the sewing machine are of the usual form of such machine, and there is provided a suitable work plate 4. ()n the base plate is disposed the improved guide and actuating means for the carrying head 15 which carries the feed arm 6, on which is suitably hinged the presser arm 7, by the pivots 8,

(see Fig. IV), carrying the w rk holder or presser foot 10, a tension spring 9 being provided to hold the same down yieldingly in position.

A friction ratchet Wheel 11 is disposed underneath the machine to drive the pinion for driving the carrying head, the same be-- ing-provided with the detent pawl 13 held in position by the spring pressed pin 13 on the screw 13. The actuating pawl 14 is operated by the link 15 which is held under tension by the spring 15 and is connected to the pivoted arm 33 which is actuated by the pitman or link 32 connected to an arm on the rock shaft 31 driven by suitable connections to working parts of the sewing machine. as clearly appears in detail in Fig. III. The vertical shaft 20, which carries and is driven by the ratchet wheel 11, extends inwardly through the base uide plate 9 and carries the pinion 28 whici meshes with the side 23) and end 30 of the internal rack of the carrier head 19, as clearly appears in Figs. IV and V.

The carrier head 19 is provided with downwardly projecting flanges 19 disposed in rectangular relation, and rests upon the intermediate guide block 27 which is provided with guide ribs 25 on its under side ada ted to travel in the guideways 24 in the said base plate 5. These parts are slotted and disposed to act in precisely the same manner as the arts bearing similar numbers ap caring 1n the patent application of Michae Petrocchi above referred to where the are described in detail.

1 connection 16 to be operated by the foot or otherwise, is provided for operating the lifter for the presser foot or work and for releasing the sewing machine tension. A lever 54 is fulcrumed at 55 on the side of the arm of the machine, (see Fig. II), and is actuated by slotted lever 53 which is acted on bythe link 52 by the connection 16. A downwardly-proiecting arm 56, terminating in a Suitable enlargement or holder,

head, carries a depending book 58 which is pivoted at 57, and is held yieldingly (lm"nward by the spring pressed pin 60 against the projecting finger 59. Theposit-ion of the said hook is adjustable by the set screw til, and the yielding pin (50 permits the hook when it engages th opposed book 17, to swing into more serurc engagement as the parts are elevated. An upwardly projecting rigid book 17 is secured to the hinged aim Land pr icrts upwardly in position to engage the book 5': I when the work holder has oomph ted its evolution, whereby when the uincrtion i6 is pulled. the hii'iged arm 7 will be raised because the hook 5S is in position to engagev the hook l7. and owinto the pivoted relation of the said hook and the yielding comurction. the same is very secur ly engaged. although its tendenqv otherwise would he to swing out if en gagrnwnt.

The forward end of arm Bl is iii*; i at 54' to tlu thread tension release mien: which is carried ll; thesewingmachintmad.

Underneath l'lu- |':ill'i(* arm 6 is r urcd a guard 6; by a h rizontal flange 2. hh'il is upwardlv mil-ve l at earl: end to plfitw't the lubricated parts of the carrier ii i.

The space about the arm 2 is eli'ertively closed and the access of dust or dirt to the rarrier head and guides is ueventcd by a series of slides 26. 26' 26". slotted to conform to the said arm 6 and disposed in a trans verse guide slot, as clearly appears in Figs.

V and V. The separated parts and their relations to each 'other clearly appear in Fig. V and the separated parts in Fig. X.

I provide an automatic trip means that cooperates with the usual stop for such sewing machine, to insure the stopping of the machine autmuaticallv when the work is co1nplctell with the needle in the elevated positiou. so that the prcsser foot can be inlmedi atcly raised and the completed work removed and new work inserted. To this end I pivot the bent lever :55 within the casing for the carrier head, pivoting the same at 35 and providing a pin 36 on its under surface, which cooperates with the pin 37 on the top of the carrier head, whereby, when the carrier head reaches the point of completion. the lever 35 will be pushed outward to c0- operate with a release lever pivoted on the basQof the machine. A pair of these release levers is fulcrumed on the vertical pivot- 40. The release lever 38 has an upwardly-projecting stop portion 39 to cooperate with the end of the bent lever 35, and is provided with a beveled catch 41 as seen in Fig. VIII, and at the right of F igs. I and IV. These release levers engage the trip finger 46 which is carried on and rocks the shaft 63 for operating the clutch and brake mechanism 51 usually provided on sewing machines of this kind. The usual automatic release lever 43, also detail.

The lower lever 43 is consi...z'-.tly reciprocated by means ofv the arm 49 which may be actuated by means of the'shuttle or needle driving rockshaft and is out'of engagementlower lever 43 is correspondingly bent downwardly at 45 and these two parts rest yieldingly against spring pins 47 in theblock 48, the spring pressed pins 47 being provided to hold the same normally outward but yieldinglv in position. The arm 49 which may be aetuated by the shuttle or feed rock shaft (constantly reeiprocates thelower lever 43 to insure the release ofv the'trip at the proper time, as beforeindicated; trip finger 46 is secured by a set screw to rock'shaft 6'3.

. ln orderto insure the complete and efl'ective operation of my machine, I provide an interlocking device. This is operatedfrom the transi'erse trip finger rock shaft 63 assoeiated with the automatic stop means at the right of the machine. On this shaft 63 is an arm or finger (it, which cooperates with the interlocking plunger 65, which is beveled at 65", {(see Fig. XVI) and guided in suitable perforated lugs or brackets 67, (see Figs. II, I and XVI). The plunger 35 is held normally disengaged by a suitable spring. This is preferably a coiled spring 68 connected at one end to the plunger and at the opposite end to one of the brackets 67, the same being preferably an extension spring which withdraws the plunger.

The rear end of the plunger, (see Figs. II and IV) is acted upon by the finger 64. The connections 16 for raising the presser foot, (see Figs. II, IV and XVI) is perforated transversely at 66 in line with the beveled end 65 of the plunger G5, when in its upper position. Because the plunger 65 is beveled at 65 on its upper side, it enters this aperture with a wedging action, and therefore forces the connection to its'nppermost position., Because it is acted u on bv the firmer (34. (iii the shaft 63, it is impossible to swing the trip finger 46 to the locking position without the connection 16 is at its highest point to permit the plunger 65 being de presser foot, and because the lever 54 is, as

pressed by the finger'64. Vihen the trip finger 46 is engaged by the release levers, it

is therefore impossible, because otthe engagement of the plunger 65 with the connection 16, to depress thev same by the foot lever, 70 or. any means, until the-trip finger 46 is re-- leased. Because the trip finger 46 is released only on the completion of the work, the operative cannot prematurely raise the before stated, also connected to the tension, it is only possible to release the tension andpermit the withdrawal of the work after the machine is stopped. This automatic action of these various parts prevents the interferso ence by an operative with the correct opera-- tion of the machine. A machine with these features,-to use a trite expression, is substantially fool proof. The features of the invention can be made use of with other styles of carrier head and arm and with other means for actuating the same.

Much of the apparatus can be used any sort of feed mechanisnu Various modifications will'no doubt suggest themselvesto those skilled in the-art'to which this invention pertains.

Having thus deseribed'my invention, what I claim as new and desire to secure by Let 5 ters Patent is:

1.- In a special work sewing machine, the combination of a'carrier-head, means for guiding the same in a predetermined path, a work holder carried by thecarri'er head, 00 automatic stop means for-said sewing machine, including a rock shaft and a trip arin carried-thereby, a pair of release levers cooperating with said trip arm to hold said with stop mechanism.inoperative,one of said rei arm when the needle is in the elevated position, a pivoted lever cooperating with the second of' saidrelease levers, and-adapted to be actuated by said carrier head at a predetermined position, whereby whensaid carrier head reaches said predetermined:- position the sewing machine is automatically stopped and the needle retained in the ele rated position, all eoacting substantially as described for the purpose specified.

2.. In a special work sewing machine, the combination of a-earrier head adapted to travel in a adi-angular 'path, a, trip pin carried by said carrier head, a work holder carried by said carrier head adapted to travel in a quadrangular path, an automatic stop mechanism for said sewing machine, a trip finger for actuating the same, a release lever normally engaging said trip finger for holding said autou'iatic stop mechanism !n operative, a pin having connection with said releaselevcr disposed in the path of the trip pin on the said carrier head to be actuated .rier head guided thereon, anarm projecting from said carrier head, a spring pressed arm carried by said last named arm, a work holder carried thereby, an upwardly pro-- jecting hook on said arm, an elevator hook yieldingly pivoted in place, and disposed to engage the said hook on the work holder arm whenthe work holder reaches a predetermined position, means for actuating said elevator hook, an automatic means for stop ping the sewing machifie when said work holder reaches said predetermined position, all coacting substantially as described and forthe purpose specified,

4. In a special work sewing machine, the combination of automatic stop mechanism, having a rock shaft, :1 finger carried by said rock shaft, a Work holder, means for lifting said work holder, an interlocking plunger adapted to engage the work holder lifting means, and disposed to be actuated into engaging position byvthe finger on said rock shaft when the automatic stop mechanism is actuated to release the machine to permit its operation, and spring means holding said vplunger normally'disengaged, all coacting substantially as described and for the purpose specified.

5. In a special work sewing machine for the attachment of labels or the like, the com bination of an automatic stop mechanism having a rock shaft, a finger carried by said rock shaft, a work holder, means for lifting said work holder, an interlocking plunger adapted to engage thework holder lifting means, and disposed to be actuated by the finger on said rock shaft into engaging position when the automatic stop mechanism is actuated to release the machine to permit its operation, all coacting substantially as de scribed for the purpose specified.

6. In a special work sewing machine, the

combination of an automatic stop mechanism, a work holder, means for releasing said work holder, and an interlock for preventing the operation of said woyk holder release, connected to be controlled by the automatic stop mechanism, all coacting substantially as described for the purpose specified.

In witness whereof, I have hereunto set my hand and seal in the'presenee of two witnesses.

ARTHUR ROSENTHAL. a 3.]

Witnesses:

Ross L. SALE,- WM. VANDENBEBG, 

